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author | unknown <FreddyFunk@users.noreply.github.com> | 2019-02-07 18:28:06 +0100 |
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committer | unknown <FreddyFunk@users.noreply.github.com> | 2019-03-29 16:42:19 +0100 |
commit | 798d76f4c7018174e58702fb06a042dc8c84f0be (patch) | |
tree | acfd88bacaf40e3c0895ab5503aac20ec0feb470 /src/common/data_compression.cpp | |
parent | Merge pull request #2266 from FernandoS27/arbitration (diff) | |
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Diffstat (limited to 'src/common/data_compression.cpp')
-rw-r--r-- | src/common/data_compression.cpp | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/common/data_compression.cpp b/src/common/data_compression.cpp new file mode 100644 index 000000000..624b8ac47 --- /dev/null +++ b/src/common/data_compression.cpp @@ -0,0 +1,46 @@ +// Copyright 2019 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <lz4.h> + +#include "data_compression.h" + +namespace Compression { + + +std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size) { + if (source_size > LZ4_MAX_INPUT_SIZE) { + // Source size exceeds LZ4 maximum input size + return {}; + } + const auto source_size_int = static_cast<int>(source_size); + const int max_compressed_size = LZ4_compressBound(source_size_int); + std::vector<u8> compressed(max_compressed_size); + const int compressed_size = LZ4_compress_default(reinterpret_cast<const char*>(source), + reinterpret_cast<char*>(compressed.data()), + source_size_int, max_compressed_size); + if (compressed_size <= 0) { + // Compression failed + return {}; + } + compressed.resize(compressed_size); + return compressed; +} + +std::vector<u8> DecompressDataLZ4(const std::vector<u8>& compressed, std::size_t uncompressed_size) { + std::vector<u8> uncompressed(uncompressed_size); + const int size_check = LZ4_decompress_safe(reinterpret_cast<const char*>(compressed.data()), + reinterpret_cast<char*>(uncompressed.data()), + static_cast<int>(compressed.size()), + static_cast<int>(uncompressed.size())); + if (static_cast<int>(uncompressed_size) != size_check) { + // Decompression failed + return {}; + } + return uncompressed; +} + +} // namespace Compression |